EPA and EU Phthalates on Rtx-50

	Peaks
1.	Dimethyl phthalate
2.	Diethyl phthalate
3.	Benzyl benzoate
4.	Diisobutyl phthalate
5.	Di-n-butyl phthalate
6.	Bis(2-methoxyethyl) phthalate
7.	Bis[4-methyl-2-pentyl] phthalate isomer 1
8.	Bis[4-methyl-2-pentyl] phthalate isomer 2
9.	Bis(2-ethoxyethyl) phthalate
10.	Di-n-pentyl phthalate

Injection
Column	Rtx-50, 30 m, 0.25 mm ID, 0.25 µm (cat.# 10523)
Standard/Sample	Benzyl benzoate (cat.# 31847)
	EPA Method 8061A phthalate esters mixture (cat.# 33227)
Diluent:	Methylene chloride
Conc.:	50.0 µg/mL (80 μg/mL for internal standard benzyl benzoate)
Inj. Vol.:	1 µL split (split ratio 20:1)
Liner:	Premium 3.5 mm Precision liner w/wool (cat.# 23320.1)
Inj. Temp.:	280 °C
Split Vent Flow Rate:	3 mL/min
Oven
Oven Temp.:	200 °C (hold 0.5 min) to 320 °C at 30 °C/min (hold 1 min)
Carrier Gas	He, constant linear velocity
Linear Velocity:	66.7 cm/sec, 39.5 psi, 272.3 kPa @ 200 °C

Detector

Mode:

Scan

Scan Program:

Group	Start Time (min)	Scan Range (amu)	Scan Rate (scans/sec)
1	0.9	59-400	-

Transfer Line Temp.:

300 °C

Analyzer Type:

Quadrupole

Source Temp.:

280 °C

Electron Energy:

70 eV

Solvent Delay Time:

0.9 min

Tune Type:

PFTBA

Ionization Mode:

Instrument

Shimadzu 2010 GC & QP2010+ MS

Notes

The flow rate of 66.7 cm/sec is equivalent to 3 mL/min @ 200 °C. The MS scan interval is 0.1 sec.

Acknowledgement

The authors would like to thank Shimadzu Corporation for their consultation with the operation of the QP2010 Plus GC-MS instrument.

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